Noiposi 5Pcs 3.7V 700mAh 20C Upgrade Lithium Battery with X6 Charger for Syma X5C X5 X5C-1 X5SC X5SC-1 X5SW CX-30W CX-31W RC Quadcopter The batteries charger built in protection IC,over charge protection short circuit protection Upgraded battery offers more power, more safety and higher performance for your quadcopter. High capacity can bring you longer flying time than the original 500mah! Item size:43*25*8.5mm/1.69*0.99*0.33in Suitable for :Syma X5 X5C 4 channel 2.4GHz RC quadcopter F5C,CX-30W/C31,Skytech M68,Heliway 905 Quadcopters Compact and solid body ensures the battery more stable and shockproof.To make the battery charging process more secure, you can look at lipo safety bag in our shop,the product ASIN:B01GDSNLCQ